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