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