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