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