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