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