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