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