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