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