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