One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(21,22)(23,33)(24,38)(25,31)(26,32)(27,30)(28,36)(29,41)(34,46)(35,44)(37,45)(39,43)(40,47)(42,48)(49,50)(51,52) involution — undirected(2,4)(5,6)(7,13)(8,11)(9,12)(10,15)(14,19)(16,18)(17,20)(21,23)(22,28)(24,39)(25,37)(26,36)(27,35)(29,46)(30,45)(31,33)(32,44)(34,40)(38,49)(41,50)(42,51)(43,48)(47,52) involution — undirected(5,7,9,15)(6,10,12,13)(8,16,17,14)(11,19,20,18)(21,24,27,40)(22,29,30,48)(23,34,35,39)(25,41,26,42)(28,43,45,46)(31,47,32,38)(33,49,44,52)(36,50,37,51)(5,8,9,17)(6,11,12,20)(7,14,15,16)(10,18,13,19)(22,30)(23,35)(24,40)(31,32)(36,37)(41,42)(43,46)(49,52)(6,12)(10,13)(11,20)(18,19)(21,25,27,26)(22,31,30,32)(23,36,35,37)(24,41,40,42)(28,44,45,33)(29,47,48,38)(34,50,39,51)(43,52,46,49)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.