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