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