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