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