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