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