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