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