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