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