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