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