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