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