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