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