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