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)(19,25)(20,28)(21,24)(22,27)(23,29)(26,30)(31,32)(33,34,37,40)(35,38,41,45)(36,43,44,39)(42,48,47,46)(2,7)(5,8)(9,12)(13,15)(17,18)(19,22)(20,28)(21,24)(23,29)(25,27)(26,31)(30,32)(35,41)(38,45)(42,47)(46,48) involution — undirected(2,7)(3,10)(9,12)(11,16)(17,18,21,24)(19,22,27,25)(20,23,29,28)(26,30,32,31)(33,34)(35,38)(36,39)(37,40)(41,45)(42,46)(43,44)(47,48)(1,3,6,10)(2,8,7,5)(4,11,14,16)(9,15,12,13)(17,18)(19,22)(20,23)(21,24)(25,27)(26,30)(28,29)(31,32)(1,4,6,14)(2,9,7,12)(3,11,10,16)(5,13,8,15)(17,19,21,27)(18,22,24,25)(20,26,29,32)(23,30,28,31)(33,35)(34,38)(36,42)(37,41)(39,46)(40,45)(43,48)(44,47)(1,5,6,8)(2,10,7,3)(4,13,14,15)(9,16,12,11)(17,20,21,29)(18,23,24,28)(19,26,27,32)(22,30,25,31)(33,36,37,44)(34,39,40,43)(35,42,41,47)(38,46,45,48)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.