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