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