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)(19,25,27,22)(21,24,28,30)(26,31,32,29)(1,2)(3,4)(9,11,12,15)(10,13,14,16)(19,26)(21,28)(22,29)(24,30)(25,31)(27,32)(10,14)(13,16)(17,19,21,26,20,27,28,32)(18,22,24,29,23,25,30,31)(2,4)(6,8)(19,27)(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.