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