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