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