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