pivot with row_number()

CREATE TABLE [dbo].[data](
    [id] [int] NULL,    
    [branch_id] [int] NULL,
    --[branch_loc] varchar(20),
    [employee] [varchar](20) NULL,
    [employee_sal] decimal(32,2),
) ON [PRIMARY]

insert into [data]
select 1,1,'Muller','3000' union
select 2,1,'Meler','2000' union
select 3,1,'Schmidt','4000' union
select 4,1,'Schultz','6000' union
select 5,2,'Schroder','7000' union
select 6,2,'Thomas','8000' union
select 7,3,'Stephan','2000' union
select 8,2,'Thomas','9000'

select * from data

select branch_id,
[1_emp] as emp1, [2_emp] as emp2, [3_emp] as emp3,
[4_emp] as emp4, [5_emp]as emp5,
[1_emp_sal], [2_emp_sal], [3_emp_sal], [4_emp_sal], [5_emp_sal]
from
(
select
convert(varchar,ROW_NUMBER() over (partition by  branch_id order by [id]))+'_emp' employee_branch_id,
branch_id,employee,
convert(varchar ,ROW_NUMBER() over (partition by  branch_id order by [id]))+'_emp_sal' employeesalary_branch_id
,[employee_sal]
    from data
) data_with_employee_branch_id
pivot
(
  max(employee) --it must be a aggregat, since we have only one row the max of a string will be the string
  for employee_branch_id in ( [1_emp], [2_emp], [3_emp], [4_emp], [5_emp] )
) as data_pvt1
pivot
(
  max([employee_sal]) --it must be a aggregat, since we have only one row the max of a string will be the string
  for employeesalary_branch_id in ( [1_emp_sal], [2_emp_sal], [3_emp_sal], [4_emp_sal], [5_emp_sal] )
) as data_pvt2

but i want the output in the below format

1                Muller     3000.00     Meler   2000.00    Schmidt    4000.00       Schultz   6000.00      
2            Schroder    7000.00     Thomas  8000.00    Thomas   9000.00        NULL        NULL 
3           Stephan      2000.00      NULL        NULL          NULL      NULL         NULL       NULL

emp5  5_emp_sal

  NULL   NULL

NULL     NULL

NULL   NULL