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