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