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