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