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