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