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