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