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