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