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