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