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