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