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