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