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