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