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