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