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