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