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