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