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