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