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