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