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