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