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