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