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