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)(17,18,24,28)(19,29,26,20)(21,27,23,22)(25,31,32,30)(1,3,4,8)(2,5,6,7)(9,11)(10,14)(12,15)(13,16)(17,19,21,31,24,26,23,30)(18,25,22,20,28,32,27,29)(2,6)(3,8)(9,12,13,10)(11,15,16,14)(17,20,24,29)(18,26,28,19)(21,32,23,25)(22,30,27,31)(2,6)(5,7)(11,16)(14,15)(17,21,24,23)(18,22,28,27)(19,30,26,31)(20,25,29,32)(2,6)(5,7)(17,22,23,18,24,27,21,28)(19,20,30,25,26,29,31,32)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.