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