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