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