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