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