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