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