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