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