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