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