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