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