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