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