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