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