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