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