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