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