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