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)(11,14)(12,13)(15,16)(17,18)(19,23)(20,28)(21,26)(22,30)(24,27)(25,32)(29,31)(1,3,4,8)(2,5,6,7)(17,19,23,18)(20,26,32,29)(21,28,31,25)(22,30,24,27)(10,13)(14,16)(17,20,24,21,23,32,22,31)(18,25,27,29,19,28,30,26)(17,21,22,20,23,31,24,32)(18,26,30,28,19,29,27,25)(9,11,12,15)(10,14,13,16)(17,22,23,24)(18,27,19,30)(20,31,32,21)(25,29,28,26)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.