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