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