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