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