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