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