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