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