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