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