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