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