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