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)(19,26)(21,23)(27,32)(29,31)(33,34)(35,43)(36,40)(37,47)(38,42)(39,44)(41,45)(46,48) involution — undirected(3,9)(7,13)(10,15)(14,16)(17,18,22,25)(19,23,26,21)(20,28,30,24)(27,31,32,29)(33,35,38,44)(34,39,42,43)(36,45,46,37)(40,47,48,41)(2,6)(7,13)(8,11)(14,16)(17,19,22,26)(18,21,25,23)(20,27,30,32)(24,31,28,29)(33,34,38,42)(35,39,44,43)(36,40,46,48)(37,41,45,47)(1,2)(3,7)(4,8)(5,6)(9,13)(10,14)(11,12)(15,16)(17,19)(18,23)(20,27)(21,25)(22,26)(24,29)(28,31)(30,32)(33,34)(35,39)(36,40)(37,41)(38,42)(43,44)(45,47)(46,48) involution — undirected(1,3)(2,7)(4,10)(5,9)(6,13)(8,14)(11,16)(12,15)(17,20,22,30)(18,24,25,28)(19,27,26,32)(21,31,23,29)(33,36,38,46)(34,40,42,48)(35,37,44,45)(39,41,43,47)(1,4)(2,8)(3,10)(5,12)(6,11)(7,14)(9,15)(13,16)(17,21,22,23)(18,19,25,26)(20,29,30,31)(24,32,28,27)(33,37)(34,41)(35,36)(38,45)(39,40)(42,47)(43,48)(44,46)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.