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