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