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