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