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