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