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