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