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