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