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