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