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