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