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