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