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