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