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