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