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