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