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