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