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