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