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