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