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)(11,14)(12,16)(13,15)(17,18,23,27,22,19,21,25)(20,26,30,31,28,24,29,32)(9,11,13,12)(10,14,15,16)(17,19,22,18)(20,26,28,24)(21,25,23,27)(29,31,30,32)(2,5)(6,8)(10,15)(11,12)(17,20,22,28)(18,24,19,26)(21,29,23,30)(25,31,27,32)(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,16,15,14)(20,28)(24,26)(29,30)(31,32)(11,12)(14,16)(20,28)(24,26)(29,30)(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.