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)(12,13)(14,15)(17,18)(19,23)(20,26)(21,24)(22,25)(27,31)(28,32)(29,30)(33,34,38,43)(35,41,44,39)(36,45,46,40)(37,47,48,42)(1,3)(2,5)(4,12)(6,10)(7,9)(8,16)(11,14)(13,15)(19,20)(23,26)(27,28)(31,32)(35,44)(36,46)(39,41)(40,45) involution — undirected(2,7)(3,10)(8,15)(11,12)(17,19,22,20)(18,23,25,26)(21,27,30,28)(24,31,29,32)(33,35,38,44)(34,39,43,41)(36,47,46,42)(37,40,48,45)(1,3)(2,5)(4,11)(6,10)(7,9)(8,13)(12,14)(15,16)(17,20,22,19)(18,23,25,26)(21,28,30,27)(24,31,29,32)(33,36,38,46)(34,40,43,45)(35,42,44,47)(37,41,48,39)(1,4,6,14)(2,8,7,15)(3,11,10,12)(5,13,9,16)(17,18)(19,26)(20,23)(21,29)(22,25)(24,30)(27,31)(28,32)(33,35)(34,41)(36,42)(37,45)(38,44)(39,43)(40,48)(46,47)(1,5)(2,3)(4,13)(6,9)(7,10)(8,11)(12,15)(14,16)(17,21)(18,24)(19,27)(20,28)(22,30)(23,31)(25,29)(26,32)(33,37,38,48)(34,42,43,47)(35,40,44,45)(36,41,46,39)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.