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