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