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