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