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