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