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