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