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