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