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