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