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