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