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