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