One vertex per element, one color per generator, with an edge from x to x·s.
(2,7,9,13)(8,14,16,15)(17,18)(19,22,26,31)(20,25)(21,24)(23,27,32,28)(29,30)(1,2,5,13,6,9,4,7)(3,8,10,15,11,16,12,14)(17,19)(18,22,24,31)(20,28)(21,26)(23,30,32,25)(27,29)(1,3)(2,8)(4,12)(5,10)(6,11)(7,14)(9,16)(13,15)(17,19)(18,23)(20,28)(21,26)(22,30)(24,32)(25,31)(27,29) involution — undirected(1,4,6,5)(2,7,9,13)(3,10,11,12)(8,15,16,14)(19,26)(22,31)(23,32)(27,28)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.