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