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