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