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