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