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