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