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