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