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