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