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