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