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