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