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