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