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)(17,18,22,26)(19,23,28,31)(20,24,21,25)(27,30,29,32)(1,3,5,4)(2,6,7,8)(19,27)(20,21)(23,30)(24,25)(28,29)(31,32)(9,11,12,16)(10,13,14,15)(17,19,22,28)(18,23,26,31)(20,27,21,29)(24,30,25,32)(1,4,5,3)(2,6,7,8)(17,20)(18,24)(19,28)(21,22)(23,31)(25,26)(17,19,22,28)(18,23,26,31)(20,27,21,29)(24,30,25,32)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.