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