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