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