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