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