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