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