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