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