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