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