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