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