Round Robin schedule is easy to visualize, you do not need any special forms.
Just imagine people sitting at the table across each other.
The first player never moves, all others move to the next chair with each round.
That is it! Simple and brilliant! And it will work with any number of players!
Round
  1 2 3 4
1
  8 7 6 5
  1 8 2 3
2
  7 6 5 4
  1 7 8 2
3
  6 5 4 3
  1 6 7 8
4
  5 4 3 2
  1 5 6 7
5
  4 3 2 8
  1 4 5 6
6
  3 2 8 7
  1 3 4 5
7
  2 8 7 6