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