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