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