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