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