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