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