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