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