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