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