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