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