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