One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,6)(5,7)(9,10,12,14)(11,15,16,13)(17,18,23,22)(19,24,28,31)(20,25,21,26)(27,30,32,29)(1,3,5,4)(2,6,7,8)(17,19,23,28)(18,24,22,31)(20,29,21,30)(25,27,26,32)(9,11,12,16)(10,13,14,15)(17,20)(18,25)(19,27)(21,23)(22,26)(24,30)(28,32)(29,31)(1,4,5,3)(2,6,7,8)(18,22)(19,28)(20,25)(21,26)(27,30)(29,32)(17,21)(18,26)(19,27)(20,23)(22,25)(24,30)(28,32)(29,31) involution — undirectedA 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.