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