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