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