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