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