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