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