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