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