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)(11,13)(12,14)(15,16)(17,18,22,21)(19,26,23,24)(20,28,31,32)(25,27,30,29)(1,3,5,4)(2,6,8,7)(9,11)(10,13)(12,15)(14,16)(17,19,22,23)(18,24,21,26)(20,29,31,27)(25,28,30,32)(1,3,5,4)(2,7,8,6)(11,15)(13,16)(17,20,19,27,22,31,23,29)(18,25,24,32,21,30,26,28)(1,4,5,3)(2,6,8,7)(11,15)(13,16)(17,21,22,18)(19,26,23,24)(20,30,31,25)(27,28,29,32)(10,14)(13,16)(18,21)(24,26)(25,30)(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.