One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,7,8,5)(9,10)(11,14)(12,13)(15,16)(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)(1,3)(2,5)(4,8)(6,7)(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)(10,13)(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) 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)(21,33,36,37)(24,38,40,43)(27,41,34,44)(31,45,47,35)(39,48,46,42)(3,8)(5,7)(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.