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)(17,18)(19,28)(20,25)(21,24)(22,26)(23,27)(29,30)(31,32)(33,34)(35,38)(36,44)(37,41)(39,43)(40,45)(42,47)(46,48) involution — undirected(3,9)(7,13)(10,15)(14,16)(17,19,23,21)(18,24,27,28)(20,29,26,31)(22,30,25,32)(33,35)(34,38)(36,42)(37,43)(39,41)(40,46)(44,47)(45,48)(2,6)(7,13)(8,11)(14,16)(33,35,37,43)(34,39,41,38)(36,42,45,48)(40,47,44,46)(1,2)(3,7)(4,8)(5,6)(9,13)(10,14)(11,12)(15,16)(17,20,23,26)(18,25,27,22)(19,29,21,31)(24,32,28,30)(33,35)(34,39)(36,42)(37,43)(38,41)(40,47)(44,46)(45,48)(1,3)(2,7)(4,10)(5,9)(6,13)(8,14)(11,16)(12,15)(17,21,23,19)(18,24,27,28)(20,31,26,29)(22,30,25,32)(33,34)(35,39)(36,44)(37,41)(38,43)(40,45)(42,46)(47,48)(1,4)(2,8)(3,10)(5,12)(6,11)(7,14)(9,15)(13,16)(17,22,23,25)(18,26,27,20)(19,30,21,32)(24,31,28,29)(33,36,37,45)(34,40,41,44)(35,42,43,48)(38,46,39,47)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.