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