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