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