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