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