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