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