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