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