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