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