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