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