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