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