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