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