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