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