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