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