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