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