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