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