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