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)(11,14)(12,15)(13,16)(17,18,23,27)(19,28,26,22)(20,24,21,25)(29,32,30,31)(9,11)(10,13)(12,16)(14,15)(17,19,22,18,23,26,28,27)(20,29,31,24,21,30,32,25)(2,5)(6,8)(11,16)(13,14)(17,20)(18,24)(19,29)(21,23)(22,31)(25,27)(26,30)(28,32) involution — undirected(1,3,4,7)(2,6,5,8)(9,11)(10,14)(12,16)(13,15)(17,21,23,20)(18,25,27,24)(19,30,26,29)(22,32,28,31)(11,16)(13,14)(20,21)(24,25)(29,30)(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.