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