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