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