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