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