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)(11,13)(12,14)(15,16)(17,18)(19,23)(20,27)(21,30)(22,25)(24,29)(26,31)(28,32)(1,3)(2,6)(4,7)(5,8)(9,10)(11,15)(12,14)(13,16)(17,19,22,21)(18,23,25,30)(20,26,28,29)(24,27,31,32)(1,2,5,4)(3,6,8,7)(9,11)(10,13)(12,16)(14,15)(17,20,21,29,22,28,19,26)(18,24,23,27,25,31,30,32)(1,2,5,4)(3,7,8,6)(11,16)(13,15)(20,28)(24,31)(26,29)(27,32)(1,4,5,2)(3,7,8,6)(10,14)(13,15)(20,28)(24,31)(26,29)(27,32)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.