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