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