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