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