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