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