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