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