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