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)(17,18,21,25)(19,27,30,23)(20,24,22,26)(28,29,32,31)(1,3,5,7)(2,6,8,4)(9,11,12,15)(10,13,14,16)(17,18)(19,28)(20,26)(21,25)(22,24)(23,29)(27,31)(30,32)(1,4,5,6)(2,7,8,3)(10,14)(13,16)(17,19,21,30)(18,23,25,27)(20,29,22,31)(24,28,26,32)(2,8)(3,7)(10,14)(13,16)(17,20,21,22)(18,24,25,26)(19,29,30,31)(23,28,27,32)(18,25)(23,27)(24,26)(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.