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