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