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