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