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