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