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