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