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