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