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