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