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