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