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