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