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