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