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