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