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