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