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