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