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