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