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