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