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