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