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