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