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)(11,16)(12,14)(13,15)(17,18,22,25)(19,27,30,24)(20,21,26,23)(28,32,31,29)(1,3,4,8)(2,5,6,7)(11,12)(14,16)(17,19,22,30)(18,24,25,27)(20,31,26,28)(21,32,23,29)(3,8)(5,7)(9,11,13,12)(10,14,15,16)(17,20,23,18,22,26,21,25)(19,28,29,27,30,31,32,24)(2,6)(5,7)(17,21,22,23)(18,20,25,26)(19,29,30,32)(24,28,27,31)(9,12,13,11)(10,14,15,16)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.