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