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