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