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