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