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