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)(17,18,22,25)(19,21,24,31)(20,23,30,32)(26,29,27,28)(1,3,5,8)(2,6,4,7)(10,11)(12,13)(1,2,5,4)(3,6,8,7)(9,11,14,10)(12,15,13,16)(17,19,21,25,22,24,31,18)(20,27,29,23,30,26,28,32)(1,4,5,2)(3,6,8,7)(9,12,14,13)(10,15,11,16)(17,20)(18,23)(19,26)(21,29)(22,30)(24,27)(25,32)(28,31)(9,13,14,12)(10,15,11,16)(17,21,22,31)(18,24,25,19)(20,28,30,29)(23,26,32,27)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.