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