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