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