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