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