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