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