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