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