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