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