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