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