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