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