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