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