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