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