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