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