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