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