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