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