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