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