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