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