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