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