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