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