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