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