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