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