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