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