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