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