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