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)(17,18,22,23,21,25,20,26)(19,24,29,30,27,32,28,31)(5,6)(7,8)(9,11,12,15)(10,13,14,16)(18,23)(20,22)(24,30)(25,26)(28,29)(31,32)(1,2,3,4)(6,8)(17,19)(18,24)(20,28)(21,27)(22,29)(23,30)(25,32)(26,31)(10,14)(13,16)(18,25)(19,27)(23,26)(28,29) 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.