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