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