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