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