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