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