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