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