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