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