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