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