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