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