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