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