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