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