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