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