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