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