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