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