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