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