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