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