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