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