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