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