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