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