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