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