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