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