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