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