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)(17,18,23,31,22,26,21,27)(19,28,30,24,29,32,20,25)(2,6)(7,8)(17,19,22,29)(18,24,26,25)(20,21,30,23)(27,32,31,28)(1,3,5,4)(2,7,6,8)(10,13)(14,16)(17,20,21,29,22,30,23,19)(18,24,27,28,26,25,31,32)(1,4,5,3)(2,8,6,7)(17,20,21,29,22,30,23,19)(18,25,27,32,26,24,31,28)(9,11,12,15)(10,14,13,16)(18,26)(24,25)(27,31)(28,32)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.