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)(19,27,29,43)(20,24,31,39)(21,34,35,25)(23,36,38,30)(28,42,32,46)(33,48,44,41)(37,47,40,45)(1,3)(2,5)(4,8)(6,7)(9,10)(11,14)(12,13)(15,16)(20,31)(24,39)(28,32)(33,44)(37,40)(41,48)(42,46)(45,47) involution — undirected(2,6)(3,8)(10,13)(14,16)(17,19,21,30,22,29,35,36)(18,23,25,27,26,38,34,43)(20,32,33,47,31,28,44,45)(24,40,41,46,39,37,48,42)(2,6)(5,7)(9,11,12,15)(10,14,13,16)(17,20,22,31)(18,24,26,39)(19,28,29,32)(21,33,35,44)(23,37,38,40)(25,41,34,48)(27,42,43,46)(30,45,36,47)(10,13)(14,16)(19,29)(20,31)(23,38)(24,39)(27,43)(30,36)(33,44)(41,48) 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.