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