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