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