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