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