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