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