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