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