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