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