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