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