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