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