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