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