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