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)(19,23)(20,21)(22,24)(25,26,29,27)(28,31,32,30)(1,2)(3,4)(5,6)(7,8)(10,13)(14,16)(18,20)(19,24) involution — undirected(2,6)(3,7)(9,10)(11,14)(12,13)(15,16)(17,19,21,24)(18,22,20,23)(25,27,29,26)(28,31,32,30)(1,3,5,7)(2,4,6,8)(9,10)(11,14)(12,13)(15,16)(17,19)(18,22)(20,23)(21,24)(25,28)(26,30)(27,31)(29,32)(1,4)(2,7)(3,6)(5,8)(9,11,12,15)(10,14,13,16)(17,20,21,18)(19,23,24,22)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.