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