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