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