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)(8,12,14,13)(17,18,23,26)(19,21,25,22)(20,28,31,27)(24,29,32,30)(1,3,5,12,7,11,6,13)(2,8,15,16,4,14,9,10)(17,19,22,18,23,25,21,26)(20,28,30,32,31,27,29,24)(3,11)(8,14)(10,16)(12,13)(17,20)(18,24)(19,27)(21,29)(22,30)(23,31)(25,28)(26,32) involution — undirected(1,4,7,2)(3,8,11,14)(5,9,6,15)(10,12,16,13)(17,21,23,22)(18,25,26,19)(20,29,31,30)(24,28,32,27)(1,5,7,6)(2,9,4,15)(3,12,11,13)(8,10,14,16)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.