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