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