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