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