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