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)(11,15)(12,16)(13,14)(17,18,22,28,23,29,21,27)(19,30,31,24,20,26,32,25)(2,5)(6,8)(10,14)(11,12)(17,19,23,20)(18,24,29,25)(21,31,22,32)(26,28,30,27)(1,3,4,7)(2,6,5,8)(9,11,13,12)(10,15,14,16)(17,19,23,20)(18,25,29,24)(21,31,22,32)(26,27,30,28)(9,12,13,11)(10,16,14,15)(17,20,23,19)(18,26,29,30)(21,31,22,32)(24,28,25,27)(10,14)(15,16)(17,21,23,22)(18,27,29,28)(19,31,20,32)(24,26,25,30)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.