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