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