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