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