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