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