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