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