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