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