One vertex per element, one color per generator, with an edge from x to x·s.
(2,7)(3,11)(4,5)(9,10)(12,13)(14,15)(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)(1,2)(3,8)(4,9)(5,7)(6,10)(11,15)(12,16)(13,14)(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)(2,8)(4,11)(5,13)(6,12)(7,14)(9,15)(10,16)(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)(2,9,10,7)(3,11,12,13)(8,15,16,14)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.