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)(19,23)(20,26)(21,29)(22,24)(25,28)(27,32)(30,31)(33,34)(35,43)(36,41)(37,47)(38,40)(39,44)(42,45)(46,48) involution — undirected(3,9)(7,13)(10,15)(14,16)(17,19)(18,23)(20,27)(21,30)(22,28)(24,25)(26,32)(29,31)(33,35,38,44)(34,39,40,43)(36,45,46,37)(41,47,48,42)(2,6)(7,13)(8,11)(14,16)(18,24)(19,28)(26,30)(27,29)(34,40)(39,43)(41,48)(42,47) involution — undirected(1,2)(3,7)(4,8)(5,6)(9,13)(10,14)(11,12)(15,16)(17,19)(18,25)(20,29)(21,30)(22,28)(23,24)(26,32)(27,31)(33,34)(35,39)(36,41)(37,42)(38,40)(43,44)(45,47)(46,48) involution — undirected(1,3)(2,7)(4,10)(5,9)(6,13)(8,14)(11,16)(12,15)(17,20)(18,26)(19,29)(21,23)(22,31)(24,30)(25,32)(27,28)(33,36,38,46)(34,41,40,48)(35,37,44,45)(39,42,43,47)(1,4,5,12)(2,8,6,11)(3,10,9,15)(7,14,13,16)(17,21,22,32)(18,27,24,29)(19,30,28,26)(20,25,31,23)(33,37)(34,42)(35,36)(38,45)(39,41)(40,47)(43,48)(44,46)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.