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)(11,12)(13,14)(15,16)(17,18)(19,20)(21,23)(22,24)(26,28)(30,31)(10,14)(11,15)(17,19,22,21)(18,23,24,20)(26,28)(30,31)(11,15)(12,16)(19,21)(20,23)(25,26,29,28)(27,31,32,30)(1,2)(3,5)(4,6)(7,8)(9,11,13,15)(10,12,14,16)(17,20,22,23)(18,19,24,21)(25,27,29,32)(26,30,28,31)(1,3,4,7)(2,5,6,8)(9,12)(10,15)(11,14)(13,16)(17,21,22,19)(18,23,24,20)(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.