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