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