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)(25,28)(26,29)(30,32)(33,34)(35,43)(36,39)(37,42)(38,41)(40,45)(44,48)(46,47)(1,3)(2,7)(4,11)(5,14)(6,12)(8,15)(9,16)(10,13)(17,18)(19,24)(20,23)(21,28)(22,25)(26,30)(27,32)(29,31)(34,39)(36,37)(40,47)(41,42)(43,48)(44,45) involution — undirected(1,4,6,5)(2,8,9,13)(3,11,12,14)(7,15,16,10)(17,19,22,27)(18,24,25,32)(20,26,21,29)(23,30,28,31)(33,35,38,46)(34,40,41,48)(36,45,37,44)(39,47,42,43)(3,12)(7,16)(10,15)(11,14)(17,20,22,21)(18,23,25,28)(19,26,27,29)(24,30,32,31)(34,41)(39,42)(40,48)(43,47)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.