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