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