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