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