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)(11,13)(12,14)(15,16)(17,18,22,26)(19,24,21,23)(20,25,29,32)(27,31,28,30)(1,3,4,7)(2,5,6,8)(9,11)(10,13)(12,15)(14,16)(18,23)(19,21)(24,26)(25,30)(27,28)(31,32)(2,6)(5,8)(10,14)(11,15)(17,19,22,21)(18,24,26,23)(20,27,29,28)(25,31,32,30)(9,11)(10,13)(12,15)(14,16)(17,20,22,29)(18,25,26,32)(19,27,21,28)(23,30,24,31)(11,15)(13,16)(17,19,22,21)(18,24,26,23)(20,28,29,27)(25,30,32,31)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.