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