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