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