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