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