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