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)(11,13)(12,14)(15,16)(17,18)(19,23)(20,22)(21,24)(26,28)(29,31)(1,3,6,4)(2,7,8,5)(10,11)(12,16)(17,19,22,21)(18,23,20,24)(25,26,30,28)(27,29,32,31)(9,10,13,11)(12,14,16,15)(17,19,22,21)(18,24,20,23)(25,27,30,32)(26,31,28,29)(1,4,6,3)(2,7,8,5)(9,11,13,10)(12,15,16,14)(17,20,22,18)(19,23,21,24)(25,28,30,26)(27,29,32,31)(1,5,6,7)(2,3,8,4)(9,12,13,16)(10,14,11,15)(17,21,22,19)(18,23,20,24)(25,29)(26,27)(28,32)(30,31)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.