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