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