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