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