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