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)(17,18,23,27)(19,28,32,43)(20,25,34,41)(21,26,22,36)(24,31,38,30)(29,42,45,47)(33,39,35,40)(37,46,48,44)(9,10)(11,15)(12,14)(13,16)(17,19,21,31,23,32,22,30)(18,24,36,43,27,38,26,28)(20,29,35,46,34,45,33,44)(25,37,39,47,41,48,40,42)(1,3,5,4)(2,6,7,8)(9,11,12,16)(10,13,14,15)(17,20)(18,25)(19,29)(21,35)(22,33)(23,34)(24,37)(26,40)(27,41)(28,42)(30,44)(31,46)(32,45)(36,39)(38,48)(43,47)(11,16)(13,15)(19,30)(21,22)(24,28)(26,36)(29,44)(31,32)(33,35)(37,42)(38,43)(39,40)(45,46)(47,48) involution — undirected(1,4,5,3)(2,6,7,8)(10,14)(13,15)(17,21,23,22)(18,26,27,36)(19,31,32,30)(20,33,34,35)(24,28,38,43)(25,39,41,40)(29,44,45,46)(37,47,48,42)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.