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