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