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