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