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