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