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