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