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