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