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