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