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