One vertex per element, one color per generator, with an edge from x to x·s.
(10,14)(15,17)(16,21)(22,23)(25,26,31,36)(27,37,38,32)(28,34,29,33)(30,35,40,39)(1,2)(3,4)(5,6)(7,8)(9,10,13,14)(11,17,19,15)(12,16,20,21)(18,23,24,22)(25,27)(26,32)(28,35)(29,39)(30,34)(31,38)(33,40)(36,37)(2,6)(4,7)(12,20)(16,21)(18,24)(22,23)(25,28,31,29)(26,33,36,34)(27,35,38,39)(30,32,40,37)(2,6)(3,8)(9,10)(11,17)(12,16)(13,14)(15,19)(18,23)(20,21)(22,24)(25,27)(26,32)(28,35)(29,39)(30,34)(31,38)(33,40)(36,37) involution — undirected(1,3)(2,7)(4,6)(5,8)(9,11,13,19)(10,15,14,17)(12,18,20,24)(16,22,21,23)(25,29,31,28)(26,34,36,33)(27,35,38,39)(30,32,40,37)(1,4,5,7)(2,3,6,8)(9,12,13,20)(10,16,14,21)(11,18,19,24)(15,22,17,23)(25,30,31,40)(26,35,36,39)(27,34,38,33)(28,37,29,32)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.