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