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