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