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