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