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