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