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