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