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)(20,28)(23,30)(26,32)(29,31)(33,34)(35,41)(36,45)(37,40)(38,47)(39,42)(43,44)(46,48)(1,3,6,4)(2,7,8,9)(5,11,14,12)(10,15,13,16)(17,18)(19,22)(20,23)(21,24)(25,27)(26,29)(28,30)(31,32)(33,35,39,37)(34,40,42,41)(36,43,47,46)(38,44,45,48)(2,8)(7,9)(10,13)(15,16)(17,18,21,24)(19,22,27,25)(20,23,28,30)(26,29,32,31)(33,35,39,37)(34,41,42,40)(36,46,47,43)(38,44,45,48)(1,2)(3,9)(4,7)(5,10)(6,8)(11,16)(12,15)(13,14)(17,18)(19,25)(20,23)(21,24)(22,27)(26,31)(28,30)(29,32)(33,36)(34,38)(35,43)(37,46)(39,47)(40,44)(41,48)(42,45) involution — undirected(1,4,6,3)(2,9,8,7)(5,12,14,11)(10,16,13,15)(17,19)(18,22)(20,26)(21,27)(23,29)(24,25)(28,32)(30,31)(33,37,39,35)(34,40,42,41)(36,43,47,46)(38,48,45,44)(1,5,6,14)(2,10,8,13)(3,11,4,12)(7,15,9,16)(17,20)(18,23)(19,26)(21,28)(22,29)(24,30)(25,31)(27,32)(33,38)(34,36)(35,44)(37,48)(39,45)(40,43)(41,46)(42,47)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.