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