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