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