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