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