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