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