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