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