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