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