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