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