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