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