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