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