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