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