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