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