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