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