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