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