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