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