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