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