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