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