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