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