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