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