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