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