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