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