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